Preparation:
– Fill a rocks glass with ice and pour into shaker.
– Add tequila, triple sec, lime juice and agave nectar.
– Cover and shake vigorously for 3-5 seconds, until foamy.
– If using salt, place in a shallow dish. Moisten the rim of the rocks glass with the lime wedge, then dip the rim in salt.
– Pour contents of shaker into the glass.
– Garnish with a lime wedge and serve immediately.